Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6a98c2f32fbe45a…

MALICIOUS

PDF

92.4 KB Created: 2021-06-26 02:58:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5997f8999f2332979d6801ebc0d482f2 SHA-1: 684e7bada8f77e743dad9f18cd59f01e542ef4f8 SHA-256: b6a98c2f32fbe45a4f952c63b2f69081634bff4f43ad36186013e1f901d3c23e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS platforms. The presence of these links suggests an attempt to direct users to malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://se-ty.ru/uploads/userfiles/file/tafonapizopelug.pdf
    • https://stcc-sa.com/motakamel/Ups/files/35782594135.pdf
    • http://bogelaipigeon.com/upload/file/vuwivorubij.pdf
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/901e2fc05cff0222455b3b28b7ad5eae/jewozina.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/51965da71aa00078dccfe3ac831643a1/28155551214.pdf
    • http://walkercombsfamilyreunion.com/clients/d/df/dfd517ab040340b2551da60fba195f5f/File/45146454039.pdf
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/8698d098c5d8f150fd6864e48eb1376f/pasepakeranaxisamavaxeb.pdf
    • http://zelene-centrum.cz/webpagebuilder/ckfinder/userfiles/files/62504734014.pdf
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/3bdd65a5004a106520629e144b6974b7/9867546911.pdf
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/65d835db2e2a7025d4517fd20bab4919/80647933111.pdf
    • http://bjhtdszdh.com/v15/Upload/file/2021631023368387.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/87562010e2ecad3b60a76f2db644c814/64926941435.pdf
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/lipegokejisasanug.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16076f2e8be7e3---7582625356.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16085c736eeee2---fesumesife.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/tmdld6ulrvstqab9b7e04pt744/sikisibajusegag.pdf
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d07a0b0012---18962363577.pdf
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/380ede4cf2802201270a4cd68c7329e7/44308313880.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9f5571c40---burumitifol.pdf
    • https://gulfcans.com/home/madarmun/public_html/gulfcans/images/bulk_images/files/filusofedonusebixad.pdf
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/da202277c5f9f3486c41bb97c984f13d/88629054603.pdf
    • http://radio-salsa.com/php/rs/filesupload/file/lekapejuzevovalur.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160bf89abe939f---xebujizezadozizujaja.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=english+stories+for+grade+5+pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106c5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x106C5 16792 bytes
font_01_sfnt_off00011ed7.bin
8338c0b10d5e296661ca22c69fffdfb3c78e046a6bc71480ec6a8565315c1694
pdf-font-stream PDF embedded font (sfnt) at offset 0x11ED7 17236 bytes
font_02_sfnt_off00014baa.bin
6d2ddca0745675341b27f509e3823bf64d25464dc867fbe3dde2970a5da5706c
pdf-font-stream PDF embedded font (sfnt) at offset 0x14BAA 10896 bytes